Add commands 14

Author: timerring

14_common_image_processing_commands_in_Matlab_(4).md

@@ -1,3 +1,23 @@
+- [Matlab常用图像处理命令108例（四）](#matlab常用图像处理命令108例四)
+  - [37.fwind1](#37fwind1)
+  - [38.fwind2](#38fwind2)
+  - [39.getimage](#39getimage)
+  - [40.gray2ind](#40gray2ind)
+  - [41.grayslice](#41grayslice)
+  - [42.histeq](#42histeq)
+  - [43.hsv2rgb](#43hsv2rgb)
+  - [44.idct2](#44idct2)
+  - [45.ifft2](#45ifft2)
+  - [46.ifftn](#46ifftn)
+  - [47.sim2bw](#47sim2bw)
+  - [48.im2col](#48im2col)
+  - [49.im2double](#49im2double)
+  - [50.im2uint8](#50im2uint8)
+  - [51.im2uint16](#51im2uint16)
+  - [52.imadjust](#52imadjust)
+  - [53.imapprox](#53imapprox)
+
+
 # Matlab常用图像处理命令108例（四）
 
 ## 37.fwind1